Worked on enhancing TypeScript support for Leaflet ChinaTMSProviders by contributing to the grafana/k6-DefinitelyTyped repository. Developed and integrated official TypeScript type definitions, ensuring that developers using leaflet.chinatmsproviders benefit from improved type safety and a smoother development experience. Created a dedicated test file to demonstrate basic usage and verify the correctness of the new typings, which helps maintain reliability as the codebase evolves. Additionally, implemented an npmignore file to streamline package publishing and reduce unnecessary files in the published package. The work focused on TypeScript, DefinitelyTyped, and Leaflet, addressing type safety and package hygiene for the broader developer community.